The electron geometry of PO33- (phosphate ion) is tetrahedral. This is due to the presence of four regions of electron density around the central phosphorus atom: three bonding pairs from the three oxygen atoms and one lone pair of electrons.
On the other hand, the molecular geometry is based on the arrangement of only the bonded atoms. In the case of the phosphate ion, with a lone pair influencing the shape, the molecular geometry is trigonal pyramidal. This means that the three oxygen atoms form the base of a pyramid, with the lone pair located at the apex, which results in a slightly distorted structure compared to a perfect tetrahedron.